patch 8.0.0374: invalid memory access when using :sc in Ex mode commit https://github.com/vim/vim/commit/ba748c8a847561c043a63827bcb1d98bdebe16e6 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Feb 26 14:00:07 2017 +0100 patch 8.0.0374: invalid memory access when using :sc in Ex mode Problem: Invalid memory access when using :sc in Ex mode. (Dominique Pelle) Solution: Avoid the column being negative. Also fix a hang in Ex mode.

" Simplistic way to make spaces and Tabs visible

" This can be added to an already active syntax.

syn match Space " "
syn match Tab "\t"
if &background == "dark"
  hi def Space ctermbg=darkred guibg=#500000
  hi def Tab ctermbg=darkgreen guibg=#003000
else
  hi def Space ctermbg=lightred guibg=#ffd0d0
  hi def Tab ctermbg=lightgreen guibg=#d0ffd0
endif